Transistor as Amplifier — MCQ Practice

A Common Emitter (CE) amplifier has a collector resistance $R_C = 4,\text{k}Omega$ and an AC emitter resistance $r_e = 20,Omega$. If the emitter resistor is fully bypassed by a capacitor, what is the approximate voltage gain of the amplifier?

In a Common Emitter amplifier, if the DC emitter current ($I_E$) is $5,\text{mA}$, what is the approximate value of the AC emitter resistance ($r_e$) at room temperature ($25^circ\text{C}$)?

Which of the following statements is TRUE regarding the phase relationship between input and output voltages in a Common Emitter (CE) amplifier?

A transistor is used in a Common Emitter configuration. If the AC current gain ($\beta_{AC}$) is 120 and the voltage gain ($A_v$) is -150, what is the power gain ($A_p$) of the amplifier?

For faithful amplification by a transistor, the Q-point should be located:

An emitter bypass capacitor in a Common Emitter amplifier circuit is used to: